JP2006112880A - Relative position detector and saddle ride type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relative position detector for more effectively detecting a change in a relative position over a long range while being formed compactly and inexpensively. <P>SOLUTION: This relative position detector comprises an accelerator 11 and an enclosure 12, relatively displaceable with respect to each other. A permanent magnet 17 is disposed on the accelerator 11. In the enclosure 12, a linear Hall IC 22 for detecting a change in magnetic flux density is disposed in a range where the magnetic flux density of the permanent magnet 17 monotonously changes. As to the permanent magnet 17, a first north pole part 17c and a second south pole part 17e are disposed side-by-side in a relative displacement direction. The pole part 17e has an inclined surface 17h formed thereon whose plate thickness is thinned toward the end surface 17g side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, a relative position detection device capable of detecting a relative position between a first member and a second member provided so as to be capable of relative displacement, and the relative position detection device are provided for controlling an accelerator opening. It relates to a saddle-ride type vehicle.

  Conventionally, there are a number of devices that include a first member and a second member that can be relatively displaced, and control the control target in accordance with the displacement amount by relatively displacing the first member and the second member. .

  For example, in a saddle-ride type vehicle such as a motorcycle using an internal combustion engine, an accelerator grip is attached to a handlebar so as to be rotatable, and the accelerator is rotated with respect to the handlebar, whereby an internal combustion engine (engine) Open / close control of the throttle valve.

  In such a saddle-ride type vehicle, an electric relative position detecting device is known in which an accelerator turning operation is detected by a potentiometer, and a throttle valve is opened and closed by an actuator based on the output voltage.

  In such an electric relative position detection device, in order to prevent a situation in which the rotation operation of the accelerator does not correspond to the opening / closing operation of the throttle valve due to a malfunction of the potentiometer, the fully closed position of the accelerator is separated from the potentiometer. A mechanical fully-closed switch is provided that can detect the above and close the throttle valve.

  In addition, there is also known that a magnet is arranged on the accelerator and a magnetic relative position detection device that detects the rotation position of the accelerator using a change in magnetic flux density is installed, and that using a Hall IC. Proposed.

  For example, in Patent Document 1 below, in order to detect the rotational position of the accelerator and control the ignition of the internal combustion engine, a magnet is fixed to the accelerator, and two digital Hall ICs are fixed to the handle side. It is determined to which of the idling, medium speed range, and high speed range the opening range belongs.

Furthermore, FIG. 6 of Patent Document 2 below describes a relative position detection device in which a permanent magnet is fixed to an accelerator and two Hall ICs having the same function are fixed to a casing fixed to a handle shaft. . Although details are unknown, two Hall ICs having the same function are used to output an electrical signal corresponding to the position of the permanent magnet when the accelerator is rotated, and the amount of rotation angle of the accelerator by the manual operation unit is detected. It is stated to do.
Japanese Patent Laid-Open No. 7-324637 JP 2002-256904 A (FIG. 6)

  However, in a relative position detection device using a conventional potentiometer, the potentiometer is larger than the accelerator, so that the appearance is likely to deteriorate when installed around the accelerator. Therefore, it must be installed at a different position from the area around the accelerator and connected to the accelerator with a wire cable, etc., and the number of parts and assembly man-hours are likely to increase, and it is large compared to the accelerator. Since a potentiometer or a wire cable is disposed, it is difficult to improve the appearance quality around the accelerator.

  In addition, in a conventional relative position detection device using magnetism, for example, in Patent Document 2, a change in magnetic flux passing between the first stator and the second stator is caused by the movement of the permanent magnet piece, that is, the rotation of the rotor. It is described that an electric signal corresponding to the rotation angle of the rotor is output as detected by the IC.

  However, the relationship between the change in magnetic flux and the output of the electric signal is not specifically described, and if the permanent magnet piece of a predetermined length is used, the relative change caused by the change in the magnetic flux in a longer range No mention is made of whether a change in position can be detected.

  Accordingly, an object of the present invention is to provide a relative position detection device that can detect a change in relative position more effectively over a long range and can be configured in a compact and inexpensive manner.

  Another object is to provide a saddle-ride type vehicle that can improve the appearance quality around the accelerator.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a first member and a second member that can be displaced relative to each other, wherein a magnet is disposed on the first member, and the second member includes A relative position detection device in which a Hall IC for detecting a change in the magnetic flux density is disposed within a range in which the magnetic flux density of the magnetic field of the magnet changes monotonously, and the magnet has an end face side in the relative displacement direction. The relative position detection device is characterized in that an inclined surface is formed so that the plate thickness is reduced toward the surface.

  The invention according to claim 2 has a first member and a second member that can be displaced relative to each other, a magnet is disposed on the first member, and a magnetic flux of the magnetic field of the magnet is disposed on the second member. A relative position detecting device in which a Hall IC for detecting a change in magnetic flux density is disposed within a range in which the density changes monotonously, wherein the magnet is provided with a magnetic body on an end face in the relative displacement direction. A relative position detection device is provided.

  The invention according to claim 3 is provided with a metal plate having magnetism disposed opposite to the magnet in addition to the configuration according to claim 1 or 2, wherein the Hall IC includes the metal plate and the metal plate. It is arrange | positioned between magnets.

  According to a fourth aspect of the present invention, there is provided a saddle-ride type vehicle in which the relative position detection device according to any one of the first to third aspects is mounted for controlling an accelerator opening, the magnet and the magnet One of the Hall ICs is fixed to the handlebar, and the other is fixed to an accelerator grip that is rotatably attached to the handlebar, and the rotation position of the accelerator grip with respect to the handlebar is detected as the relative position. The present invention is characterized in that it is a saddle-ride type vehicle that is detected by the device.

  According to the relative position detecting device of the first aspect, since the magnet is formed with the inclined surface whose thickness becomes thinner toward the end face side in the relative displacement direction, the change in the magnetic flux density on the end face side is smoothly smoothed. Therefore, the detection range can be effectively lengthened without lengthening the magnet.

  In addition, the magnet is fixed to one of the first member and the second member that can be displaced relative to each other, and the Hall IC is fixed in a non-contact state with the magnet in the same magnetic field for detection formed by the magnet. Thus, since a detection signal can be obtained, it is not necessary to provide a potentiometer or the like as in the prior art, and the relative position detection device that can easily prevent malfunction as described above can be configured in a compact and inexpensive manner.

  According to the second aspect of the present invention, since the magnetic material is disposed on the end face in the relative displacement direction, the magnetic flux density can be smoothly changed on the end face side, so that the magnet can be detected without lengthening the magnet. The range can be effectively lengthened.

  According to the third aspect of the present invention, the magnetic plate is provided so as to be opposed to the magnet in a state of being separated from the magnet, and the Hall IC is disposed between the metal plate and the magnet. The magnetic flux density of the detection magnetic field can be collected toward the metal plate, and the magnetic flux density can be easily detected by the first Hall IC compared to the case where the metal plate is not provided. At the same time, since the first Hall IC is arranged between the metal plate and the magnet, the magnetic flux from the outside is blocked by the metal plate and hardly reaches the first Hall IC, and it is easy to prevent malfunction or the like.

  According to the saddle-ride type vehicle according to the fourth aspect, the accelerator can be controlled by fixing the magnet and the Hall IC to the handlebar and the accelerator grip and detecting the position of the accelerator grip. Such a potentiometer or the like need not be provided, can be installed compactly, and a relative position detection device can be installed around the accelerator grip. In addition, there is no need for a wire for connecting the accelerator grip and the potentiometer, and the appearance quality can be easily improved, and the number of parts and the number of assembly steps can be reduced.

Embodiments of the present invention will be described below.
Embodiment 1 of the Invention

  1 to 8 show an example in which the relative position detection device of the first embodiment is applied to an accelerator portion of a motorcycle as a saddle-ride type vehicle.

  As shown in FIGS. 1 and 2, the relative position detection device is provided with an accelerator grip (accelerator) 11 as a “first member” rotatably attached to the vicinity of one end of the handle bar 10. A housing 12 as a “second member” is fixed to the bar 10 at a position corresponding to the tube guide portion 11 a at the end of the accelerator 11 in the vehicle width direction center side. The tube guide portion 11a of the accelerator 11 is accommodated in the casing 12 in a state where it can be relatively rotated (relatively moved).

  In the housing 12, as shown in FIG. 2, a detection unit 13 for detecting the opening degree of the accelerator 11 is provided facing the tube guide portion 11 a of the accelerator 11. An extended detection signal wiring 13a is connected to a control unit 14 provided on a vehicle body (not shown), and a control signal wiring 14a extending from the control unit 14 is connected to a controller 16 for operating a drive source.

  As shown in FIG. 3, the accelerator 11 of the relative position detection device includes a tube guide portion 11 a disposed inside the housing 12 and a grip portion 11 b disposed outside the housing 12. The guide portion 11a has a rotation restricting portion 11c for restricting the rotation of the accelerator 11 and an arc shape centering on the rotation axis L1 of the accelerator 11, and is embedded in the tube guide portion 11a of the accelerator 11. A permanent magnet 17 is provided.

  On the other hand, as shown in FIGS. 1 and 2, the housing 12 includes a pair of divided housings 12a and 12b that are fixed in a state where the handle bar 10 is sandwiched from both sides in the diametrical direction. A tube guide portion 11a of the accelerator 11 is rotatably disposed in an internal space formed by 12b.

  As shown in FIGS. 1 and 4, an accommodating portion 12 c in which the tube guide portion 11 a of the accelerator 11 is disposed is partitioned by a rib-like protruding portion 12 d inside the one divided housing 12 a. The protrusion 12d is disposed so as to have a predetermined positional relationship with the rotation restricting portion 11c of the tube guide portion 11a of the accelerator 11. When the rotation restricting portion 11c contacts the protrusion 12d, the accelerator 12 11 is restricted, and is configured to be rotatable between a fully closed position θo and a fully open position θm.

  And the detection part 13 for detecting the magnetic flux density of the magnetic field for a detection formed with the permanent magnet 17 of the tube guide part 11a of the accelerator 11 is being fixed to the accommodating part 12c of this division | segmentation housing | casing 12a, and its vicinity. Yes. As shown in FIGS. 5 and 6, the detection unit 13 has a flat circuit board 20 supported by a board holder 18 fixed to the divided housing 12 a, and the circuit board 20 has a magnetic plate made of iron plate or the like. A metal plate 19 is embedded. The substrate itself can be iron, or an iron plate can be disposed under the substrate.

  As shown in FIG. 5, the circuit board 20 is provided with a narrow width portion 20a arranged in the accommodating portion 12c of the divided housing 12a. The narrow width portion 20a is provided with a first Hall IC. A digital Hall IC 21 and a linear Hall IC 22 as a second Hall IC are mounted so as to face each other in a state of being separated from the permanent magnet 17.

  The permanent magnet 17 provided on the tube guide portion 11a of the accelerator 11 is formed by fixing two first and second magnetic pole portions 17a and 17b adjacent to each other in the rotation direction of the accelerator 11, The first magnetic pole portion 17a arranged on the front side in the A direction from the fully closed position θo side to the fully open position θm side has the first N pole portion 17c on the outer side and the first S pole portion 17d on the inner side, and is located on the rear side in the A direction. The arranged second magnetic pole portion 17b has a second S pole portion 17e on the outside and a second N pole portion 17f on the inside. Therefore, the permanent magnet 17 includes a first N pole portion 17c and a second S pole portion 17e disposed outside the first magnetic pole portion 17a and the second magnetic pole portion 17b in the A direction from the fully closed position θo side to the fully open position θm side. Are arranged side by side.

  And as shown in FIG. 6, the 2nd S pole part 17e is formed with the inclined surface 17h so that plate | board thickness may become thin toward the end surface 17g side.

  On the other hand, the digital Hall IC 21 and the linear Hall IC 22 of the circuit board 20 are arranged at a predetermined distance from each other in the direction orthogonal to the rotation axis L1 of the accelerator 11, that is, the rotation direction of the accelerator 11.

  Among these, the digital Hall IC 21 is substantially in the boundary portion 17j between the first magnetic pole portion 17a and the second magnetic pole portion 17b in the circumferential direction of the permanent magnet 17 in the state shown in FIG. 6, that is, in the fully closed position θo of the accelerator 11. It is arranged at the corresponding position. More precisely, the play of the accelerator 11 is provided in the vicinity of the fully closed position θo, and the digital Hall IC 21 is arranged at a position slightly corresponding to the first N pole portion 17c side in the vicinity of the boundary portion 17j.

  When the accelerator 11 is rotated from the fully closed position θo to the fully open position θm, the magnetic flux density received by the digital Hall IC 21 changes as shown in FIG. The digital Hall IC 21 is configured to always receive the magnetic force from the permanent magnet 17 in the entire range in which the accelerator 11 and the casing 12 are relatively displaced.

  Further, the first detection signal from the digital Hall IC 21 outputs the voltage V11 when the magnetic flux density at the position is equal to or higher than the predetermined threshold T1, and outputs the voltage V10 when it is smaller than the predetermined threshold T1. Here, the voltage V10 is 0V.

  In this example, the digital Hall IC 21 is disposed at a position where it always receives the magnetic force from the permanent magnet 17 from the fully closed position θo to the fully open position θm. The digital Hall IC 21 is as shown in FIG. Will receive a large magnetic flux.

  Further, as shown in FIG. 6, the linear Hall IC 22 is arranged at a position facing the first N pole portion 17c of the permanent magnet 17 at the fully closed position θo of the accelerator 11, and rotates the accelerator 11 to the fully opened position θm. Are arranged so as to relatively move to a position facing the second S pole portion 17e (inclined surface 17h) of the permanent magnet 17.

  When the accelerator 11 is rotated from the fully closed position θo to the fully open position θm, the magnetic flux density received by the linear Hall IC 22 is, as shown in FIG. 7C, from the first N pole part 17c side to the second S pole part. Up to 17e, the magnetic flux density is set to change monotonously.

  The monotonically changing range of the magnetic flux density means that the magnetic flux density detected when the magnetic flux density is displaced from the fully closed position θo to the fully open position θm or from the fully open position θm to the fully closed position θo passes through the extreme value. Without increasing, it is the range that increases or decreases, and here it is the range that decreases monotonously.

  Further, the second detection signal from the linear Hall IC 22 outputs the voltage V20 when the magnetic flux density at the position is equal to or higher than the predetermined threshold T2, and when smaller than the predetermined threshold T2, the magnetic flux is inversely proportional to the magnetic flux density. A voltage V2θ corresponding to the density is output. Here, the voltage V20 is 0V.

  The control unit 14 to which the outputs of the digital Hall IC 21 and the linear Hall IC 22 are input receives a control signal for stopping power supply to the motor as a driving source when the output from the digital Hall IC 21 changes from V11 to V10. When the output from the digital Hall IC 21 is V10 instead of V11, a control signal corresponding to the output of the linear Hall IC 22 is output to the controller 16 when the output from the digital Hall IC 21 is V10. It is possible to operate the power supply corresponding to the output of the linear Hall IC 22.

  A description will be given of a case where the motor is operated by the accelerator 11 through the controller 16 in the motorcycle equipped with the relative position detection device having the above-described configuration.

  First, between the fully closed position θo and the predetermined opening degree θ1, as shown in FIG. 7A, the magnetic flux density at the position of the digital Hall IC 21 is equal to or higher than the threshold value T1, so the digital Hall IC 21 As shown in FIG. 7B, the first detection signal V11 indicating the fully closed position θo is output. At that time, as shown in FIG. 7C, the magnetic flux density at the position of the linear Hall IC 22 is equal to or greater than the threshold value T2, so that the linear Hall IC 22 moves from the linear Hall IC 22 to the fully closed position θoθ0 as shown in FIG. A corresponding second detection signal V20 is output. The outputs of the digital Hall IC 21 and the linear Hall IC 22 are transmitted to the control unit 14 via the detection signal wiring 13a, and a control signal for stopping power supply to the motor is transmitted from the control unit 14 to the control signal wiring 14a. Is transmitted to the controller 16 via.

  If the accelerator 11 is slightly rotated in the A direction from that position to an opening larger than the predetermined opening θ1, the magnetic flux density at the position of the digital Hall IC 21 becomes smaller than the predetermined threshold T1, and the first detection is performed. Signal V10 is output. At this time, in this embodiment, since the magnetic flux density at the position of the linear Hall IC 22 is larger than the predetermined threshold T2, the linear Hall IC is maintained in a state where the second detection signal V20 is output. For this reason, the control unit 14 outputs a control signal for stopping power supply to the motor.

  When the accelerator 11 is further rotated in the A direction to have an opening larger than the predetermined opening θ2, the magnetic flux density at the position of the linear Hall IC 22 becomes smaller than T2, and thus the first detection signal V10 is output from the digital Hall IC 21. The second detection signal V2θ corresponding to the change in the magnetic flux density is output from the linear Hall IC 22 and is transmitted to the control unit 14 via the detection signal wiring 13a. Therefore, a control signal corresponding to the second detection signal V2θ is output to the controller 16, and the motor is controlled corresponding to the second detection signal V2θ.

  Furthermore, when the accelerator 11 is at the fully open position θm, the magnetic flux density at the position of the digital Hall IC 21 is smaller than the predetermined threshold value T1, so that the first detection signal V10 is output and maintained from the linear Hall IC 22 The motor is in the fully open position θm corresponding to the second detection signal V2θ.

  When the accelerator 11 is rotated in the direction opposite to the A direction and closed, the accelerator opening is controlled in correspondence with the second detection signal V2θ from the linear hall IC 22 in the opening range larger than the opening θ2. In the range of the opening smaller than the opening θ2, the power supply to the motor is stopped.

  According to the motorcycle using such a relative position detection device, the control signal corresponding to the fully closed position θo is controlled in a state where the first detection signal V11 indicating the fully closed position θo is output from the digital Hall IC 21. When the first detection signal V10 indicating that the accelerator 11 is opened from the digital Hall IC 21 is output from the digital hall IC 21, the control signal corresponding to the second detection signal V2θ from the linear Hall IC 22 is output to the control unit. 14 can be output. Therefore, in a state where the accelerator 11 is disposed at the fully closed position θo with respect to the housing 12, the first detection signal V11 indicating the fully closed position θo is not output from the digital Hall IC 21 due to malfunction or the like, and the accelerator 11 is When the first detection signal V10 indicating the open state is output, since the second detection signal V20 indicating the fully closed position θo is output from the linear Hall IC 22, the fully-closed power supply is output from the control unit 14. A control signal corresponding to the stop state is output.

  Even when the second detection signal V2θ indicating that the accelerator 11 is opened from the linear Hall IC 22 due to malfunction or the like, the first detection signal V11 indicating the fully closed position θo is output from the digital Hall IC 21. Therefore, the control signal corresponding to the fully-closed power supply stop state is output from the control unit 14.

  As a result, even if a malfunction occurs in each Hall IC 21, 22, the control unit 14 outputs a control signal for controlling to a fully-closed power supply stop state, so that safety can be ensured.

  In addition, since the inclined surface 17h is formed in the second S pole portion 17e, the detection range (between the fully closed position θo and the fully open position θm) can be set long. That is, if the inclined surface 17h is not formed and is formed in a square shape as shown by a two-dot chain line in FIG. 8, a large magnetic force line c is generated on the end surface 17g side as shown in FIG. Therefore, the end d1 side of the magnetic flux density line d changes abruptly as indicated by a two-dot chain line in (b). Therefore, if the end portion d1 of the magnetic flux density line d that changes rapidly is measured, an appropriate relative position cannot be detected.

  On the other hand, when the inclined surface 17h is formed in the second S pole portion 17e, a small magnetic force line e is generated on the end surface 17g side as shown in FIG. 8A, so that the solid line shown in FIG. Further, the end d2 side of the magnetic flux density line d changes smoothly. Accordingly, since the end d2 of the magnetic flux density line d becomes smooth, the detection range can be effectively lengthened without increasing the total length of the permanent magnet 17.

  Moreover, the digital Hall IC 21 that detects whether or not the position is the fully closed position θo is the entire range in which the accelerator 11 and the housing 12 are relatively displaced, that is, the entire rotation range of the accelerator 11 (from the fully closed position θo to the fully open position θm). ), The magnetic force from the permanent magnet 17 is always received, so that it is difficult to be affected by the external magnetic force, and malfunction is unlikely to occur.

  That is, since this digital Hall IC 21 detects whether or not it is at the fully closed position θo, it is only necessary to receive the magnetic force only at that position. However, if a magnetic force is applied to the digital Hall IC 21 from the outside other than the fully closed position, there is a possibility that erroneous detection as if it is the fully closed position θo may occur due to the magnetic force.

  For this reason, even if the digital Hall IC 21 always receives the magnetic force from the permanent magnet 17 even in a position other than the fully-closed position, even if the magnetic force acts from the outside, the influence is small, and the magnetic force from the outside is not affected. It becomes stronger and the occurrence of malfunctions can be suppressed.

  In addition, the permanent magnet 17 is fixed to the accelerator 11, and the digital Hall IC 21 and the linear Hall IC 22 are in contact with the permanent magnet 17 in the detection magnetic field of the permanent magnet 17 in the housing 12 fixed to the handlebar 10. , Two independent detection signals can be obtained, and the control signal can be output from the control unit 14 by this detection signal, so there is no need to provide a potentiometer or the like as in the prior art, preventing a malfunction of the drive source. The relative position detecting device that is easy to perform can be configured in a compact and inexpensive manner, and can be easily mounted around the accelerator grip.

  Furthermore, it is not necessary to attach a member having a larger shape compared to the accelerator 11 such as a potentiometer as compared with the conventional one using a potentiometer, and a wire for connecting the accelerator 11 and the potentiometer is unnecessary. It is easy to improve the appearance quality, the number of parts and the number of assembly steps can be reduced, and since there are few mechanical parts, there is no need to consider changes with time.

  Further, since the first N pole portion 17c and the second S pole portion 17e of the permanent magnet 17 are arranged side by side in the direction A in which the accelerator 11 is rotated with respect to the housing 12, the first N pole portion There is a large change in the direction of the lines of magnetic force in the vicinity of the boundary portion 17j between 17c and the second S pole portion 17e, and the position is easily detected as a fully closed position by the digital Hall IC11.

  In addition, a magnetic metal plate 19 that is disposed opposite to the permanent magnet 17 is embedded in the circuit board 20, and the digital Hall IC 21 and the linear Hall IC 22 are disposed between the metal plate 19 and the permanent magnet 17. Therefore, the magnetic flux for detection magnetic field formed by the permanent magnet 17 can be collected toward the metal plate 19, and the magnetic flux density can be increased by the digital Hall IC 21 and the linear Hall IC 22 compared to the case where the metal plate 19 is not provided. Easy to detect.

At the same time, since the digital Hall IC 21 and the linear Hall IC 22 are arranged between the metal plate 19 and the permanent magnet 17, the magnetic flux from the outside is blocked by the metal plate 19 and hardly reaches the digital Hall IC 11 and the linear Hall IC 12. The occurrence of malfunction can be suppressed.
[Embodiment 2 of the Invention]

  9 and 10 show a second embodiment of the present invention.

  In the second embodiment, instead of the inclined surface 17h of the first embodiment, iron plates 24, which are magnetic bodies, are disposed on both end surfaces 17g, 17k of the permanent magnet 17.

  The iron plate 24 has a substantially L-shaped cross section, the connecting surface portion 24a abuts against the end surfaces 17g and 17k of the permanent magnet 17, and the connecting surface portion 24a of one iron plate 24 causes the first magnetic pole portion 17a side to The first N pole portion 17c and the first S pole portion 17d are configured to be short-circuited, and the second magnetic pole portion 17b side and the second S pole portion 17e are connected to the second N pole by the connecting surface portion 24a of the other iron plate 24. The pole portion 17f is configured to be short-circuited. Therefore, a large magnetic field line c as shown by a two-dot chain line in FIG.

  In such a case, as shown in FIG. 10, at both end faces 17g and 17k of the permanent magnet 17, as shown in FIG. 10 (a), the first N pole portion 17c and the first S pole portion 17d Or between the second S pole portion 17e and the second N pole portion 17f, the magnetic force mainly passes through the iron plate 24, so that the end of the magnetic flux density line d as shown by the solid line in FIG. The d2 side changes smoothly. Accordingly, since the end d2 of the magnetic flux density line d becomes smooth, the detection range can be effectively lengthened without increasing the total length of the permanent magnet 17.

  In the above-described embodiment, the saddle-ride type vehicle on which the relative position detection device is mounted has been described. However, the present invention is not limited to this, and can be applied to other types as long as the relative position is detected. Of course, an engine can also be used as a drive source.

It is the top view which showed the state which mounted | wore the accelerator with the relative position detection apparatus of Embodiment 1 of this invention, and was partially cut. It is sectional drawing which follows the AA line of FIG. 1 which shows the state which mounted | wore the accelerator with the relative position detection apparatus of the same Embodiment 1. FIG. The accelerator of the same embodiment 1 is shown, (a) is a longitudinal section and (b) is a BB end view of (a). It is a perspective view of the division | segmentation housing | casing of the same Embodiment 1. FIG. It is a top view of the detection part of the same Embodiment 1. It is sectional drawing which shows the arrangement | positioning relationship between the edge part of the accelerator of the same Embodiment 1, and a detection part. FIG. 6 is a graph showing changes in magnetic flux density and detection signal in the digital Hall IC and linear Hall IC according to the first embodiment, where (a) shows the change in magnetic flux density at the position of the digital Hall IC, and (b) shows the first. (C) shows a change in magnetic flux density at the position of the linear Hall IC, and (d) shows a change in the second detection signal. It is explanatory drawing which shows the permanent magnet of the relative position detection apparatus of Embodiment 1 and magnetic flux density. It is sectional drawing equivalent to FIG. 6 which shows Embodiment 2 of this invention. FIG. 9 is an explanatory diagram corresponding to FIG. 8 showing the second embodiment.

Explanation of symbols

10 Handlebar 11 Accelerator (first member, accelerator grip)
11a End 12 Case (second member)
13 Detection Unit 14 Control Unit 17 Permanent Magnet (Magnet)
17a 1st magnet 17b 2nd magnet 17e 2nd S pole part 17g End surface 17h Inclined surface 18 Metal plate 21 Digital Hall IC
22 Linear Hall IC (Hall IC)
24 Iron plate (magnetic material)
V10, V11 First detection signal V20, V2θ Second detection signal θo Fully closed position θm Fully open position

Claims (4)

The first member has a first member and a second member that can be displaced relative to each other, a magnet is disposed on the first member, and the second member has a magnetic flux density within a range in which the magnetic field density monotonously changes. A relative position detection device in which a Hall IC for detecting a change in the magnetic flux density is disposed,
The relative position detection device according to claim 1, wherein an inclined surface is formed on the magnet such that the plate thickness decreases toward the end surface in the relative displacement direction. The first member has a first member and a second member that can be displaced relative to each other, a magnet is disposed on the first member, and the second member has a magnetic flux density within a range in which the magnetic field density monotonously changes. A relative position detection device in which a Hall IC for detecting a change in the magnetic flux density is disposed,
2. A relative position detecting device according to claim 1, wherein a magnetic material is disposed on an end face in the relative displacement direction of the magnet. Comprising a metal plate having magnetism arranged opposite to the magnet,
The relative position detection device according to claim 1, wherein the Hall IC is disposed between the metal plate and the magnet. The relative position detection device according to any one of claims 1 to 3, wherein the relative position detection device is a saddle-ride type vehicle mounted for controlling an accelerator opening,
One of the magnet and the Hall IC is fixed to a handlebar, and the other is fixed to an accelerator grip that is rotatably attached to the handlebar, and the rotation position of the accelerator grip with respect to the handlebar is set. A saddle-ride type vehicle characterized by being detected by the relative position detection device.

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